Added "MRZ" abbreviation for German - month March

[josves]

added "MRZ" for German

Fixes #395

[codecov]

Codecov Report

Merging #400 into master will increase coverage by 1.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #400      +/-   ##
==========================================
+ Coverage   94.95%   95.96%   +1.01%     
==========================================
  Files         302      302              
  Lines        2436     2976     +540     
==========================================
+ Hits         2313     2856     +543     
+ Misses        123      120       -3     

Impacted Files	Coverage Δ
dateparser/data/date_translation_data/de.py	100.00% <ø> (ø)
dateparser/timezone_parser.py	97.05% <0.00%> (-0.77%)	⬇️
dateparser/utils/strptime.py	100.00% <0.00%> (ø)
dateparser/search/__init__.py	100.00% <0.00%> (ø)
dateparser/languages/dictionary.py	99.49% <0.00%> (+0.18%)	⬆️
dateparser/languages/locale.py	98.83% <0.00%> (+0.18%)	⬆️
dateparser/date.py	98.20% <0.00%> (+0.45%)	⬆️
dateparser/search/search.py	100.00% <0.00%> (+0.66%)	⬆️
dateparser/freshness_date_parser.py	100.00% <0.00%> (+1.05%)	⬆️
dateparser/utils/__init__.py	97.57% <0.00%> (+1.05%)	⬆️
... and 1 more

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[sarthakmadaan]

You are not supposed to directly edit data in Python modules. The data contributed by the community is stored in dateparser_data/supplementary_language_data/ which consists of additional data to supplement the data retrieved from unicode CLDR. Make changes to yaml files in Supplementary data. The data in Python modules is combined data from CLDR and Supplementary data generated by scripts and is not to be manually edited.